"They threatened us, saying we should leave or else they'd kill us. Why should we get punished if others did something bad?" he said.

Other refugees said the recent bloodshed has created an atmosphere of fear in the camp, where security has been tightened.

The usually busy camp was quiet late Saturday, with roads and shops closed.

Ikbal Hossain, deputy police chief for Cox's Bazar district, said they would take action against those responsible for the violence.

"We have identified some of them. We will bring them to justice at any cost," he told AFP.

The killings came as the Rohingya are set to commemorate the second anniversary of their mass influx into Bangladesh from Rakhine after the brutal military campaign.

UN investigators have said the 2017 violence warrants the prosecution of top Myanmar generals for "genocide".

On Thursday Bangladesh's second attempt to start repatriation of Rohingya back to Myanmar faltered after the refugees said they won't return unless their security is ensured and they were granted citizenship in their homeland.